Optical distorting apparatus.



UNITED PATEIrI'I OFFICE.

VDAVID P. MOORE, OF IVASHINGTON, DISTRICT OF COLUMBIA, ASSIGNOR TO MELINDA IV. COSTELLO, OF LOIVELL, MASSACHUSICTTS.

OPTICAL DISTORTING APPARATUS.

Specicaton of Letters Patent.

Patented oct. '10, 1905.

Application led April l0, 1905. Serial No. 254,756.

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Be it known that I, DAvID P. MOORE, a citizen ot' the United States, i'esiding' at Ta-shington, Disti'ict of Columbia, have invented certain new and useful Improvements in Optical Distorting Apparatus, ot' which the following is a specification, reference being had therein to the accompanying' drawings.

This invention relates to improvements in optical distoi'ting' apparatus; and the main object of the invention is to provide an apparatus of this character by means of which interesting' and entertaining demonstrations may be made in connection with and illusy In the accompanying' drawings, Fig'ui'e l is a vertical sectional view of the improved apf paratus. Fig. 2 is a detail view showing' the manner in which the lenses ai'e mounted, and Fig. 3 is an elevation showing the adjusting mechanism for the sections, and Fig. 4C is a detail sectional view of the adjusting' mechanism for holding the lens in adjusted position.

Referring' to the drawings, the numerals l, Q, 3, and 4t designate the series of four tubularsections, each one of which is formed substantially of an outei' tubular portion 5, open from end to end, an inner wall 6 being fitted within the portion 5, the said wall extending to a point neai' each end of the tubular poi'- tion.

Pivotally mounted within the space between each end ot' the walls 6 and the portion 5 is a lens-cai'i'ying' frame 7, provided with an operating-knob S, extending' outwardly therefrom to enable the trame to be turned on its axis, as herein shown in Fig. 2. Mounted in each lens-carrying `frame is a suitable double convex lens 9, said lens being of approximately the same diameter as the inner diameter ot' At each end of the portions 5 the walls 6.

is provided an eyepiece 10. The lenses may be arranged so as to be of varying strength, the one nearest the eye being' ot' minimum strength and each succeeding' lens being sti'onger than the one preceding'.

The section 3 is constructed somewhat differently from the remainingsections, altlioug'h pi'eserving the same general t'eature ot' having two lenses mounted in lixed relation to each other, each capable oi having' a pivoted movement. As shown in Fig'. 1, this section has both a vertical and an ang'ularly-extending portion 10', the two parts being secured together by brazing or otherwise, thus enabling' the opei'atoi' to use the apparatus to greater advantage, the section -L being connected to the outer end ot' the ang'ularly-extending' portion of thel section 3. At the intei'section oi" the two portions otl the section 3 is a pivotally-mounted frame ll, formed and mounted similarly to the lens-carrying frame 7, said trame Il carrying a iiiiri'oi' 1Q, which serves to take the rays from the vertical portion of the apparatus intothe angularly-extending' portion.

To the outer end of the section 4 and the upper end of the vertical portion voit' the section 3 is secured suitable eyepieces l2 oi smaller size than the eyepieces l0.

In oi'der that the sections 1,2, 3, and 4 may be adjustably connected together, I employ a suitable rack-and-pinion connection, as shown in the drawings, in which one section carries a slide 13, adapted to receive the sliding membei' 14, mounted on thel next section. The sliding member carrying the rack l5 is adapted to be opei'ated by a pinion 16, eai'ried by the slide 13 and operated by a thumb-nut 17. In this manner each section may be moved adjustably toward or away from its neighboring section, and thus adjusting' the distance between the lenses located adjacent to the ends which are being adjusted or without disturbing' the position of the two lenses located within each section, the relative positions of which remain the same regardless of the i'elative movement of the sections themselves.

The section 2 is provided with the outer tubular portion 18, to which is secu red a band 19, carrying the legs 2O o'f a tripod, by means of which the appai'atus is supported in position. As it is necessary sometimes to obtain the proper focus the lowci' end of the apparatus is brought nearer or carried away from IOO the Object under inspection without disturbing the position of the sections relatively to each other, and I form a rack-and-pinion connection between the portions 5 and 18, as shown in Fig. 1, by means of which the viewing portion ofthe apparatus can be moved as ries upon it the wedging or clamping nut 22,

by means of which the lens is held at the proper adjustment, the clamping-nut being adapted to be forced inward, so that its inclined walls engage the walls of the opening 23, and thus tightly secure the lens in adjusted position. j

From the foregoing description it is evident that by adjusting the sections thc proper distance apart and turning the lenses at various angles the object at which the apparatus is pointed will be observable through the upper eyepiece in a very much distorted condition, thus providing a scientific aswell as an amusement apparatus, as by the varying of the lenses and the adjustment of the sections different distortions may be secured.

What I claim as new, and desire to secure by Letters Patent, is

1. In an apparatus of this character, the combination of a plurality of separated tubes, means for adjusting' the tubes toward each other, a plurality of lenses pivotally mounted within the tubes, and means for holding the lenses stationarily in their adjusted position.

2. In an apparatus of this character, the

combination of a series of tubes adjustably mounted with relation to each other, a sup-v per tubes, another series of tubes in communication with the first-mentioned tubes atan angle thereto, an eyepiece for the upper one of said series of tubes, a reflecting-surface mounted at the junction of the two series of tubes,

and a series of lenses mounted in the tubes Y for the purpose set forth.

4. rIhe combination with a support, of a series of tubes arranged in vertical order, means for adjusting the tubes with relation to each other, an eyepiece at the upper end of the upper tubes, another series of tubes in communication with the first-mentioned tubes at an angle thereto, an eyepiece'for the upper one of said series ot' tubes, a reflecting-surface mounted at the junction of the two series of tubes, and a series of adjustably-mounted lenses mounted in the tubes for the purpose set forth.

In testimony whereof I aiiX my signature in presence oftwo Witnesses.

DAVID P. MOORE.

Witnesses:

MILTON WV. J OHNsON, J. MAE WRIGHT. 

